iSDR for Android - Download Free [Latest Version + MOD] 2025

Whats new in iSDR v5.1

6 things about iSDR

1. PLEASE NOTE: Receiving live on-air signals using iSDR requires purchasing or constructing a "quadrature sampling detector (QSD)" RF front-end device, and connecting it between an antenna and the microphone input jack.
2. When iSDR is used to receive live radio signals, receiver performance will depend largely on the quadrature sampling detector and antenna that you use.
3. Without a QSD RF front-end or a connected radio, iSDR will only play I/Q recordings of actual radio signals.
4. iSDR is for experimenters and amateur radio enthusiasts looking to construct a truly portable software-defined radio receiver.
5. iSDR is the first and only software-defined radio application compatible with the Apple iPhone®, iPod touch® and iPad™.
6. Alternatively, iSDR can be used to implement a panadapter for use with a compatible radio receiver.

Release date: 2019-11-25
Current version: 5.1
File size: 36.30 MB
Developer: Digital Confections LLC

How to setup iSDR APK:

APK (Android Package Kit) files are the raw files of an Android app. Learn how to install isdr.apk file on your phone in 4 Simple Steps:

Download the isdr.apk to your device using any of the download mirrors.
Allow 3rd Party (non playstore) apps on your device: Go to Menu » Settings » Security » . Click "Unknown Sources". You will be prompted to allow your browser or file manager to install APKs.
Locate the isdr.apk file and click to Install: Read all on-screen prompts and click "Yes" or "No" accordingly.
After installation, the iSDR app will appear on the home screen of your device.

Is iSDR APK Safe?

Yes. We provide some of the safest Apk download mirrors for getting the iSDR apk.

Download Mirrors

Mirrors: Download for Android

On iTunes: $0.99 On iTunes

Reviews

Very useful!

Exactly what I was looking for. I plan to use this app with KX2, QCX, and QSX in the future. Although I currently have none of these radios, the demo file gives me a very good understanding of what this app can do. Mind blown with the sdr/dsp stuff.

~ By InTruthIBelieve

Outdated

I wish the developer would release an update with Android X display support. Goes to show how long it’s been since this app was updated. It’s nice to see my Xiegu G90’s waterfall on a larger screen (the radio only has a 1.8” display), but frustrating knowing it could be larger still.

~ By port rhombus

Needs FT-8 mode

Any chance you would consider making an FT-8 encoding / decoding Android app? I think this would be very popular. 73! Jim - KH2SR Needs support for Google Watch

~ By TheGadgetinator

Absolute garbage.

Absolute garbage.

~ By Pheenix99

ISDR

For 99 cents it's hard to complain about this app. Struggled with a few poor connections but once the iMic was properly connected to the KX3 everything worked as advertised. Panadapter bandwidth is limited to a max of 44 kHz as near as I can tell, but the resolution on the Mobile was great, and it was easy to locate strong signals and relatively open spots in the cw bands to facilitate working expeditions. No point and click to tune the radio obviously, but a great addition to the KX3 if you're carrying an Mobile or Android already.

~ By Ka9p